public function FormState::prepareCallback in Drupal 8

Same name and namespace in other branches

1. 9 core/lib/Drupal/Core/Form/FormState.php \Drupal\Core\Form\FormState::prepareCallback()
2. 10 core/lib/Drupal/Core/Form/FormState.php \Drupal\Core\Form\FormState::prepareCallback()

Converts support notations for a form callback to a valid callable.

Specifically, supports methods on the form/callback object as strings when they start with ::, for example "::submitForm()".

Parameters

string|array $callback: The callback.

Return value

array|string A valid callable.

Overrides FormStateInterface::prepareCallback

File

core/lib/Drupal/Core/Form/FormState.php, line 1147

Class

FormState

Stores information about the state of a form.

Namespace

Drupal\Core\Form

Code

public function prepareCallback($callback) {
  if (is_string($callback) && substr($callback, 0, 2) == '::') {
    $callback = [
      $this
        ->getFormObject(),
      substr($callback, 2),
    ];
  }
  return $callback;
}